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Density for all generally the same type of wood and its average value is 1.54 g / cm3.
The volume of timber volume depends on the porosity (porosity of coniferous wood: 46 ÷ 81%, broadleaved timber: 32 480%) and moisture. It moved a volume of timber in any moisture (W) on a volume of standard humidity (18%) according to the formula:
= γ W0180γ [1 + 0.01 (1 K0) ( 18 - W)]
in which:
- and - volume of timber volume W moisture and humidity 18%. 180γW0γ
- K0 - volumetric aspect ratio.
Based on density, wood is divided into five categories: very light wood (γ0 <400 kg / m3), light wood (γ0 = 40 ÷ 500 kg / m3), light wood medium (γ0 = 500 ÷ 700 kg / m3), heavy wood (γ0 = 700 ÷ 900 kg / m3) and very heavy wood (γ0> 900 kg / m3).
The wood is very heavy like wood gnashing (γ0 = 1100 kg / m3), wood sen (γ0 = 1080kg / m3). The wood is very light as: Wood sung, sienna and white wood.
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